Viessmann VITOTRONIC 200 Quick guide

Please file in Service Binder
VITOTRONIC
r
200
VITOTRONIC
r
300-K
Vitotronic 200, Type KW6B/HO1B
Digital boiler control unit
Vitotronic 300-K, Type MW2C
Weather-compensated, digital cascade control unit
for use by heating contractor
Installation and Service
Instructions
5700 299 - 06 12/2016
Vitotronic 300-K
Vitotronic 200
Product may not be exactly as shown
Read and save these instructions
for future reference.
IMPORTANT
Certified as a component
part for Viessmann boilers

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
5700 299 - 06
2
General
Safety, Installation and Warranty Requirements
Please ensure that these instructions are read and understood before commencing installation. Failure to comply with
the instructions listed below and details printed in this manual can cause product/property damage, severe personal
injury, and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information
found in manual subsections).
WARNING
Installers must follow local regulations with respect to
installation of carbon monoxide detectors. Follow the
Viessmann maintenance schedule of the boiler contained
in this manual.
Product documentation
Read all applicable documentation before commencing
installation. Store documentation near boiler in a
readily accessible location for reference in the future
by service personnel.
For a listing of applicable literature,
please see section entitled “Important
Regulatory and Safety Requirements”.
Warranty
Information contained in this and
related product documentation must
be read and followed. Failure to do
so renders the warranty null and void.
Licensed professional heating contractor
The installation, adjustment, service and maintenance
of this equipment must be performed by a licensed
professional heating contractor.
Please see section entitled
“Important Regulatory and Installation
Requirements”.
Advice to owner
Once the installation work is complete, the heating
contractor must familiarize the system operator/
ultimate owner with all equipment, as well as safety
precautions/requirements, shutdown procedure, and
the need for professional service annually before the
heating season begins.
Operating and Service Documentation
It is recommended that all product documentation such as
parts lists, operating and service instructions be handed
over to the system user for storage. Documentation is to
be stored near boiler in a readily accessible location for
reference by service personnel.
Product Information
Vitotronic 300K, Type MW2C
For use with Viessmann boilers only.
Applicable to the following control units
Order No. 7776084
Serial No. 7554896

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5700 299 - 06
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Table of Contents
Page
General
Safety
Preparing for Installation
Installation Sequence
Commissioning
Service Scans
Safety, Installation and Warranty Requirements..............2
Product Information.....................................................2
About these Instructions.............................................5
For your Safety..........................................................6
System Example....................................................7
Installation information for the Vitotronic 200................8
Installing a Cascade Communication Module -
Vitodens 200-W.........................................................8
Preparing Boilers for Cascade Mode -Vitodens 200-W....9
Preparing Boilers for Cascade Mode -Vitocrossal
300 CU3A...............................................................12
Configure Boilers for Cascade Mode............................14
Overview of Electrical Connections, Vitotronic 300-K...........15
Inserting the LON Communication Module....................17
Mounting the Control Unit.........................................17
Inserting Cables/Leads and Applying Strain Relief.........18
Connecting Sensors.................................................18
Connecting Pumps....................................................19
120V External Connection.........................................20
Connecting Actuators................................................21
Connecting the Central Fault Message Facility..............22
External Blocking via Switching Contact......................22
External Demand via 0-10V Input................................23
External Blocking via Switching Contact......................23
External “Mixing Valve Closed”/”Mixing Valve Open”...24
External Heating Program Changeover”.......................24
Making the LON Connection.......................................25
Power Supply...........................................................27
Fitting the Control Unit Front......................................28
Opening the Control Unit...........................................29
Changing the Language..............................................30
Matching Coding Addresses to the Installed Heating
System...................................................................30
Selecting the Boiler Sequence (if required)....................31
Connecting the Control Unit to the LON System...........31
Testing Actuators on the Vitotronic 200......................35
Scanning Operating Details at the Vitotronic 200..........36
Testing Actuators and Sensors on the Vitotronic 300-K....36
Adjusting the Heating Curve.......................................37
Calling up the Service Level - Vitotronic 200................39
Leaving the Service Level - Vitotronic 200...................39
Scanning Operating Data - Vitotronic 200....................40
Brief Scan - Vitotronic 200........................................40
Calling up the Service Menu - Vitotronic 300-K............41
Leaving the Service Menu - Vitotronic 300-K...............42
Change Passwords - Vitotronic 300-K.........................42
Resetting all Passwords to their Factory Set Condition -
Vitotronic 300-K.......................................................42
Scanning Operating Data - Vitotronic 300-K.................43
Resetting Operating Data - Vitotronic 300-K.................43
Brief Scan - Vitotronic 300-K......................................44
Maintenance Display.................................................45

Table of Contents
4
Page
5700 299 - 06
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
Troubleshooting
Function Description, Vitotronic 200/300-K
Coding 1 Vitotronic 200
Coding 2 Vitotronic 200
Coding Levels
Coding 1 Vitotronic 300-K
Coding 2 Vitotronic 300-K
Designs
Components
Parts
Specification
FaultDisplay.............................................................46
Fault Codes..............................................................47
Boiler Water Temperature Control of the
Vitotronic 200.........................................................53
Cascade Control of the Vitotronic 300-K.....................53
Heating Circuit Control Unit of the Vitotronic 300-K......58
DHW Tank Temperature Control................................63
Calling up Coding Level 1..........................................65
“General” Group.......................................................66
“Boiler” Group..........................................................66
Calling Up Coding Level 2..........................................67
“General” Group.......................................................67
“Boiler” Group..........................................................71
Calling up Coding Levels............................................72
Resetting Coding to their Factory Set Condition............72
“General” Group.......................................................73
“Cascade” Group......................................................75
“DHW” Group...........................................................77
“Solar” Group...........................................................77
“Heating Circuit 1”, “Heating Circuit 2”,
“Heating Circuit 3” Group..........................................78
“General” Group.......................................................81
“Cascade” Group......................................................87
“DHW” Group...........................................................89
“Solar” Group...........................................................91
“Heating Circuit 1”, “Heating Circuit 2”,
“Heating Circuit 3” Group..........................................95
Connection and Wiring Diagrams..............................101
Sensors.................................................................105
Extension EA1 Accessory........................................106
Parts List - Vitotronic 300-K....................................108
Specification - Vitotronic 300-K...............................110

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5700 299 - 06
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Safety
Take note of all symbols and notations intended to draw attention to potential hazards or important product
information. These include “WARNING”, “CAUTION”, and “IMPORTANT”. See below.

IMPORTANT
Warnings draw your attention to the presence of
potential hazards or important product information.
Cautions draw your attention to the presence of
potential hazards or important product information.
Helpful hints for installation, operation or maintenance
which pertain to the product.
This symbol indicates that additional, pertinent
information is to be found.
This symbol indicates that other instructions must
be referenced.
WARNING
Indicates an imminently hazardous situation which,
if not avoided, could result in loss of life, serious injury
or substantial product/property damage.
CAUTION
Indicates an imminently hazardous situation which,
if not avoided, may result in minor injury or product/
property damage.
About these Instructions

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
5700 299 - 06
6
If you smell gas
HDon’t smoke! Don’t use naked flames or cause sparks
(e.g. by switching lights or electrical appliances on
and off)
HOpen windows and doors
HClose the gas shut-off valve
HInform your heating engineers/service contractors from
outside the building
HObserve the safety regulations of your gas supply
company (see gas meter) and those of your heating
engineers (see start-up or instruction report).
In emergencies
HImmediately switch off the power supply, e.g. at the
separate fuse or power supply disconnect switch
(unless there is a smell of gas).
HClose the shut-off valves in the oil pipes or close the
gas shut-off valve, whichever applicable.
HUse suitable extinguishers in the event of fire.
Installation of additional components
The installation of additional components which have not
been tested together with the boiler can adversely affect
the function and performance of the boiler.
Our warranty does not cover and we accept no liability
for damage attributable to the installation of such
components.
Boiler room conditions
HDo not use a room in which the air is polluted by
halogenated hydro-carbons (e.g. as contained in
aerosols, paints, solvents and cleaning agents)
HDo not use a room subject to high levels of dust
HDo not use a room subject to permanently high humidity
HThe room should be frost-protected
HMax. ambient temperature 95°F (35°C).
HProvide good ventilation and do not close or obstruct
vents (if installed).
This symbol indicates a reference to other instructions
which must be observed.
Safety
CAUTION
Follow these safety instructions closely to avoid the risk
of injury and damage to property.
For your Safety
HOperation
Before operating the boiler, make sure you fully
understand its method of operation. Your heating
contractor should always perform the initial start-up
and explain the system. Any warranty is null and void
if these instructions are not followed.
HFlue gas smell
- Deactivate heating equipment.
- Open windows and doors.
- Inform your heating contractor.
HWorking on the equipment
All personnel working on the equipment or the heating
system must have the proper qualifications and hold
all necessary licenses. Ensure main power to
equipment, heating system, and all external controls
has been deactivated. Close main gas supply valve.
Take precautions in all instances to avoid accidental
activation of power during service work.
HDangerous conditions
- Deactivate main power immediately.
- Close gas supply valve.
HMaintenance and cleaning
Regular inspection and service by a qualified heating
contractor is important to the performance of the boiler.
Neglected maintenance impacts on warranty; regular
inspection ensures clean, environmentally friendly and
efficient operation. We recommend a maintenance
contract with a qualified heating contractor.
HTechnical documentation
- Installation Instruction and Service Instructions
- Operating Instructions and User’s Information Manual
Additional applicable literature:
- Accessory manuals

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Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Preparing for Installation
System Example
Multi boiler system with several heating circuits with
mixing valve and low loss header (with/without DHW
heating)
Note: This scheme is a basic example without
shut-off valves or safety equipment.
This does not replace the need for local
engineering.
Legend
1 Multi boiler system with 2 to 8 Vitodens 200-W or
Vitocrossal 300 CU3A hydraulic cascade with low
loss header and connection accessories
with
2 Vitodens 200-W/Vitocrossal 300 CU3A in cascade mode
5 Vitodens 200-W/Vitocrossal 300 CU3A in cascade mode
3 Cascade communication module (KMK or LON)
4 Internal extension H1
6 Vitotronic 300-K
7 Outside temperature sensor ATS
qP Indirect DHW storage tank
qQ DHW temperature sensor
qW DHW recirculation pump
qZ DHW pump
rP Heating circuit with mixing valve
rE Supply temperature sensor, heating circuit M2/M3
rR Heating circuit pump, heating circuit M2/M3
and
3-way mixing valve
rT Mixing valve motor kit for heating circuit with mixing
valve (mixing valve motor and supply temperature
sensor rE)
tP Low loss header
tQ Common supply temperature sensor
tW Boiler pump
tE Boiler pump
Note: Multiboiler systems can only be made up of the
same boiler type and size. Mixing boiler types and
sizes is not permitted.

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
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8
Installation Information for the Vitotronic 200
For installation, commissioning, maintenance
and service of Vitodens 200-W or Vitocrossal
300 CU3A with Vitotronic 200: see the
appropriate installation instructions and service
instructions.
Preparing for Installation
System Example (continued)
Vitotronic 200 (set codes at every Vitotronic 200 - boiler control)
Switching mode from standalone/weather compensated control to constant temperature control (see page 14).
Required coding
Group Code
General 01:2 Multi boiler system with Vitotronic 300-K
Note: Code “00:0” is set automatically.
General
07:1
07:2
07:3
07:4
07:...
Setting the boiler number at the Vitotronic 200 of the respective boiler
Boiler 1 (factory set condition)
Boiler 2
Boiler 3
Boiler 4
... Boiler (up to 8)
Vitotronic 300-K
Required coding
Group Code
General 00:... System version, see table for coding address 00 in the overview on page 73.
General 7E:0 Without positive pressure flue gas cascade
Cascade 35:1
35:2
35:3
35:4
35:...
Do not adjust
Multi boiler system with two boilers
Multi boiler system with three boilers
Multi boiler system with four boilers (factory set condition)
Multi boiler system with ... boilers (up to 8)
Vitotronic 200-H (if installed)
Required coding
Group Code
General 97:1 The outside temperature is accepted by the LON BUS
Installing a Cascade Communication Module - Vitodens 200-W
Depending on the package ordered the KMK
communication module may be part of the standard
delivery.
Optional LON communication is available using the LON
communication module. LON communication will require
LON communication cards for the Vitotronic 300-K and
one card for each boiler installed in the system.
If a DHW tank is to be integrated into the system, make
the connection at the Vitotronic 300-K (or if installed,
at the Vitotronic 200-H).

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Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
Preparing Boilers for Cascade Mode - Vitodens 200-W
Opening the control unit cover
For installation, commissioning, maintenance
and service of Vitodens 200-W with Vitotronic
200: see separate installation instructions and
service instructions.
If a DHW tank is to be integrated into the
system, make the connection at the Vitotronic
300-K.
1. Remove the external accessories connection box
cover.
2. Loosen the screws at the bottom of the boiler
(do not remove completely).
3. Remove the front encloser panel (lift up and pull
away from the boiler).
1. Slide both sides of the programming unit cover closed.
2. Release the hinged hooks located on both sides of
the control unit.
3. To open hinged cover, lift cover and then fold down
the control unit.
4. Release locking tabs as shown.
5. Remove cover.
Removing the front enclosure panel
IMPORTANT
The following procedure must be done on each Vitodens
200-W boiler connected to the Vitotronic 300-K.
Installation Sequence

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
5700 299 - 06
10
Installation Sequence
Preparing Boilers for Cascade Mode - Vitodens 200-W (continued)
Installation of the communication module/LON
communication module
The communication module is part of the standard
delivery.
1. Installing the cascade communication module/LON
communication module to the Vitotronic 200.
Legend
A Plug aVG to the Vitotronic 300-K
B2-wire communication cable 18 AWG
DTerminal strip on the KMK communication module
in the Vitotronic 200
Legend
AVitotronic 300-K
B2-wire communication cable 18 AWG
(when equipped with a cascade communication
module) or LON cable (when equipped with LON
communication module.
CBoiler with Vitotronic 200
Note: The cascade communication module/LON
communication module must be fitted into every
Vitotronic 200.
Legend
A LON connection to Vitotronic 300-K
BLON communication cable
CTerminal connection on the LON communication
module
DLON communication module

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5700 299 - 06
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Installation Sequence
Closing the control unit cover
1. Install the cover onto the control board.
2. Flip the control board back into position.
3. Secure the locking tabs as shown.
1. Set front enclosure panel on the guide rails and
push in place.
2. Tighten screws at the bottom.
3. Insert the external accessories connection box
cover in place.
Preparing Boilers for Cascade Mode - Vitodens 200-W (continued)
Reinstalling the front enclosure panel

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
5700 299 - 06
12
1. Remove the screws from the top panel and set aside.
2. Slide the top panel to the rear of the boiler and lift up.
3. Remove the retaining nuts from the control
connection cover and set aside.
4. Slide the control connection cover to the rear of the
boiler and lift up.
Preparing Boilers for Cascade Mode - Vitocrossal 300 CU3A
Installation Sequence
Accessing the control electrical connections box

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5700 299 - 06
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
Preparing Boilers for Cascade Mode - Vitocrossal 300 CU3A (continued)
LON communication module
each Vitocrossal 300 CU3A comes with a LON
communication module pre-installed.
1. Installing the cascade communication module/LON
communication module to the Vitotronic 200.
Legend
AVitotronic 300-K
BLON cable
CVitocrossal 300 CU3A with Vitotronic 200
Legend
A LON connection to Vitotronic 300-K
BLON communication cable
CTerminal connection on the LON communication
module
DLON communication module
Installation Sequence

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
5700 299 - 06
14
IMPORTANT
Configure Boilers for Cascade Mode
Installation Sequence
The following procedure must be done to configure each
boiler for constant temperature control (cascade control)
mode.
1. Turn on the boiler and set the language then press
‘OK’.
2. Set the time and date and press ‘OK’.
3. Press and hold OK and until service menu comes
up.
4. Scroll using to the service functions, press OK.
5. Scroll using to the multi-boiler system.
6. Press OK.
7. Scroll using to “Yes”.
8. Press OK.
Note: The boiler will restart in cascade mode.
9. Set the language and press ‘OK’.
Refer to the boiler Installation Instructions.
Refer to the boiler Installation Instructions.
1. Place the control cover on the control connection
housing and slide into place.
2. Install previously removed nuts onto the threaded
studs.
3. Place the top jacket panel on the top of the boiler
and slide in place.
4. Fasten the panel with the previously removed
retaining screws.
Preparing Boilers for Cascade Mode - Vitocrossal 300 CU3A (continued)
Fitting the top panels

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5700 299 - 06
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Installation Sequence
Overview of Electrical Connections, Vitotronic 300-K
Electrical connections on the Vitotronic 200
see installation instructions, of the relative
boiler.
Legend
PCB, extension for heating circuits 2 and 3
? M2/M3 Supply temperature sensor
sÖ M2/M3 Heating circuit pump
gS M2/M3 Mixing valve motor
Main circuit board, low voltage
! Outdoor temperature sensor
§/? Supply temperature sensor, common supply
/low loss header
%A DHW tank temperature sensor
%B DHW tank temperature sensor 2 for tank loading
system (accessory)
aJB Temperature sensor tank loading system
(accessories)
aVD External hook-ups
aVG KM BUS participant (Vitotronic 200 and
accessories, e.g. Vitotrol remote controls)
aVH External hook-ups
LON LON BUS, connecting cable for data exchange
with the Vitotronic 200-H and the Vitocom
Main PCB 120V~
sÖA1 Heating circuit pump
or
Primary pump, tank loading system
sA DHW pump
sK DHW recirculation pump
sL System pump
fÖ Power supply
gÖ Central fault message
gSA1 Motor for 3-way mixing valve, tank loading
system
aBH Internal power supply for mixing valve extension
PCB

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
5700 299 - 06
16
Installation Sequence
Overview of Electrical Connections, Vitotronic 300-K (continued)
Legend
AVitotronic 300-K
BDIN rail (located in junction box)

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5700 299 - 06
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Installation Sequence
Mounting the Control Unit
1. Fasten metal backplate onto mounting surface with
four fasteners.
2. Install connection enclosure onto backplate.
3. Fasten connection enclosure and midplate onto
backplate with four fasteners.
4. Install control rear section onto connection enclosure
housing. Hook control onto backplate tabs and pivot
downwards.
5. Fasten control rear section onto connection enclosure
with two fasteners.
Inserting the LON Communication Module
Making the LON connection, see page 25.
A
B
Legend
ALON communication module (accessory)
BVitotronic 300-K MW2C

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
5700 299 - 06
18
Installation Sequence
Legend
ACables with moulded strain relief
BOn-site cables; strip up to 4 in. (100 mm) insulation.
Inserting Cables/Leads and Applying Strain Relief
Run the cables from the connection enclosure into the
control unit.
Apply strain relief to cables.
Cables with moulded strain relief clamp:
Connect cable and strain relief clamp.
or
Fasten cable to the cable lead with cable tie.
Connecting Sensors
Installation point for outdoor temperature sensor
HNorth or north-western wall, 6 to 8 ft. (2 to 2.5 m) above
ground level; in multi storey buildings, in the upper half
of the second floor
HNot above windows, doors or ventilation outlets
HNot immediately below balconies or gutters
HNever paint over
Outdoor temperature sensor connection
Two-wire communication cable, max. 120 ft. (36 m)
length, AWG 18.
Legend
!Outdoor temperature sensor
§/?Supply temperature sensor, common supply/
low loss header
%ADHW tank temperature sensor 1
%BDHW tank temperature sensor 2 for tank loading
system (accessory)
aJBTemperature sensor tank loading system
(accessory)

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Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Installation Sequence
Connecting Pumps
Pumps 120V
Rated current: 2 A~
Note: Maximum pump and alarm output 6FLA shared
between all 120V outputs.
Legend
A 120V pump outputs
BTo the control unit
CDIN rail in junction box
Available pump connections
sÖA1 High temperature circuit pump/
tank loading primary pump
sÖM2 Heating circuit 2 pump
sÖM3 Heating circuit 3 pump
sA DHW pump
sK DHW recirculation pump
sL System pump

Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
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20
Installation Sequence
120V External Connection
120V pumps with an amperage draw of >2FLA
208/460/575V 3 phase pumps
240V single phase pumps
Contactor specification 120VAC 1A
ADIN rail
BContactor/relay (field supplied)
CPump
DPower supply w/disconnect and protection
Contactor specification 120VAC 1A
ADIN rail
BContactor/relay (field supplied)
CPump
DPower supply w/disconnect and protection
Contactor specification 120VAC 1A
ADIN rail
BContactor/relay (field supplied)
CPump
DPower supply w/disconnect and protection
120V pumps with an amperage draw of <2FLA
ADIN rail
BPump